Improvement in dental gold



G. J. PACK.

DENTAL GOLD. No.179,4Z3. Patented. July 4,1876."

F16. 6. FIG. 7.

Ill/MENTOR PLFEFERB, PKOTO-LITHOGRAPNER, WASHINGTON, D. C.

UNITED STATES PATENT OEEIoE.

GEORGE J. PACK, OF NEw YORK, N. Y.

IMPROVEMENT IN DENTAL GOLD.

Specification forming part of Letters Patent No. 179,423, dated July 4, 1876; application filed June 23, 1875.

To all whom it may concern:

Be it known that I, GEORGE J. PACK, of the city of New York, in the county of New York and State of New York, have invented ented to E. G. and G. Kearsing, and in combmation therewith use narrow strips of ribbongold, prepared or produced according to the process described in Letters Patent granted to me 011 the 17th day of May, 1870, or narrow strips of plain gold-foil, which may be rather thicker than the plain goldfoil ordinarily used by dentists. Such ribbongold or plain foil is cut into narrow strips, as shown in Fig. 1. I

then take sheets of the corrugated or Kearsing gold, and anneal them, so as to give them the desired quality of cohesion, and wind them upon or over one or more of such narrow strips of the ribbon or plain foil gold,introducing also, if desired, as such corrugated foil is being wound about such strips, one or more additional strips of such plain gold, and

forming the same into rolls or layers of any size required, which may afterward be out into pieces of any required length, suitable for insertion into the cavities of the teeth.

Figure 1 shows a strip of the ribbon or plain gold as used. Fig. 2 shows a part of a sheet of corrugated or shrunk gold-foil. Fig. 3 shows a roll or cylinder of such combined plain and corrugated foil, having a single longitudinal strip of ribbon or plain gold. Fig. 4 is a block out from the same. Fig. 5 is a section of the same enlarged. having two strips of ribbon or plain gold. Fig. 7 is a block of the same. Fig.8 is a section of the same enlarged.

The rolling of gold-foil into cylinders for dentists use is not new ,but by introducing into a coil or roll one or more ribbons or narrow strips ofplain gold, such ribbons or strips running lengthwise through the coil in the center, and in other parts thereof, there is imparted to such coil a quality of toughness which prevents, to a considerable degree, the instruments of the operator perforating the gold or filling as it is being condensed or pressed down into the tooth, and thus ena-v bles the filling to be more eflectually and readily packed, and different portions of tilling can be more effectually and firmly united with each other. The roll or cylinder of such plain and corrugated or shrunk gold may be formed over a mandrel, or in any desirable manner. v

To corrugate or shrink the gold-foil I prefer the process patented to E. G. and G. Kear- Fig. 6 shows a similar roll 

